George Osborne today reaffirmed his support for the Government's energy policy after activists secretly filmed his father-in-law claiming the Chancellor was privately pushing for the watering down of green promises.

The environmentalist group also filmed former minister Peter Lilley, a prominent Conservative climate change sceptic, claiming that Osborne "regrets" the commitments the Government has made on renewable energy and was putting like-minded people into ministerial positions where they can influence policy.

Lilley told an undercover reporter that Osborne was attempting to undermine green energy

The footage, obtained by the Huffington Post UK, emerged a day after it was revealed that Conservative MP Chris Heaton-Harris admitted encouraging a friend to run against the Tory candidate in today's Corby by-election on an anti-wind farms ticket.

Lord Howell - the father of Osborne's wife Frances - was secretly recorded speaking to a Greenpeace activist posing as a representative of a pressure group opposed to onshore wind farms.

The peer said: "The Prime Minister isn't familiar with these issues, doesn't understand them. Osborne is getting this message and is putting pressure on."

Lilley told the undercover activist: "The Chancellor is onside privately. He regrets all the commitments that have been made."

Asked whether the Chancellor might "need persuading" that it was necessary to water down the Climate Change Act commitments to cut UK carbon emissions by 34% by 2020 and 80% by 2050, Lilley said: "No, I can assure you."

Lilley indicated that the recent appointments of Owen Paterson as Environment Secretary and John Hayes as energy minister would ensure that the case against onshore wind farms was heard within Government.

He added: "I think Osborne wanted to get people into key positions where they could begin to get the Government off the hook."

A spokesman for Osborne today said: "The Chancellor supports Government energy policy which has helped secure record investment into the UK energy infrastructure."

Lilley accused Greenpeace of "deceit" in obtaining the interview by claiming to be from an anti-wind farm group called "Windefensible".

"I would happily gave given an interview making the same points if they had approached me honestly," said the Conservative MP.

"My remarks about the Chancellor were based on press reports, so the Independent is recycling press articles and journalists' views from other papers.

"I have never discussed climate policy with the Chancellor or anyone speaking for him."